a6e1845f3497b83dc5ef327943996f40ad295a2dc11e7beb0742364d1f6c4d75

General

Target

2024-05-23_11615aae212a57fccd1618f26eda33a9_cryptolocker.exe
Size

38KB
MD5

11615aae212a57fccd1618f26eda33a9
SHA1

1c5a5d21d810f760494c1c99b4b80d394cb6ae04
SHA256

a6e1845f3497b83dc5ef327943996f40ad295a2dc11e7beb0742364d1f6c4d75
SHA512

4a766494a41cad26e91cce186acdd590e00729cca2bee5f3f1e908136885e3e382c3a2dab43e39cf45c16d9d6d7b265f92779e55b23c2681d0f24f84c032f200
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5axK38nk:qUmnpomddpMOtEvwDpjjaYaQ8k

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2840-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2744-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2840-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2744-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2840-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2744-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2840-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2744-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2840-1-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2744-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2840-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2744-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2744 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-23_11615aae212a57fccd1618f26eda33a9_cryptolocker.exe

pid process

2840 2024-05-23_11615aae212a57fccd1618f26eda33a9_cryptolocker.exe

pid	process
2744	asih.exe

pid	process
2840	2024-05-23_11615aae212a57fccd1618f26eda33a9_cryptolocker.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral1/memory/2840-1-0x0000000000500000-0x000000000050F000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2744-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2840-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2744-27-0x0000000000500000-0x000000000050F000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-23_11615aae212a57fccd1618f26eda33a9_cryptolocker.exe

description	pid	process	target process
PID 2840 wrote to memory of 2744	2840	2024-05-23_11615aae212a57fccd1618f26eda33a9_cryptolocker.exe	asih.exe
PID 2840 wrote to memory of 2744	2840	2024-05-23_11615aae212a57fccd1618f26eda33a9_cryptolocker.exe	asih.exe
PID 2840 wrote to memory of 2744	2840	2024-05-23_11615aae212a57fccd1618f26eda33a9_cryptolocker.exe	asih.exe
PID 2840 wrote to memory of 2744	2840	2024-05-23_11615aae212a57fccd1618f26eda33a9_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_11615aae212a57fccd1618f26eda33a9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_11615aae212a57fccd1618f26eda33a9_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2840
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2744

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
38KB

MD5
85cc15f7249086e97d4e280cbc820ff4

SHA1
06f576b9dbb9f0e2d7cff921cc41113a9c782d26

SHA256
a3ed1ce3454d7f260bae1a530f962a0f376f5e6ffe1cb7c37d9bfe228bd2af13

SHA512
0bdf97702b3f3f668a84bae8315b52a6bbc7be45ad92bb709cafddaf34702e3bf4358df4fa3ec1b1cdfe70b6c67fca7b4b3db8765423a7b905aa2c1952bf0631

Download Submit
memory/2744-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2744-26-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2744-19-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/2744-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2840-0-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2840-1-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2840-2-0x0000000000390000-0x0000000000396000-memory.dmp

Filesize
24KB

Download
memory/2840-9-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2840-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads